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schilder.py 10.27 KiB
#!/usr/bin/python
# -*- encoding: utf8 -*-
from flask import Flask, flash, session, redirect, url_for, escape, request, Response, Markup
import sys, os, os.path, glob
from genshi.template import TemplateLoader
from genshi.template.text import NewTextTemplate
from flaskext.genshi import Genshi, render_response
from werkzeug.utils import secure_filename
from collections import defaultdict
import warnings
import shutil
import subprocess
from subprocess import CalledProcessError, STDOUT
import PythonMagick
import json
import tempfile
import config
app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = config.uploaddir
app.config['PROPAGATE_EXCEPTIONS'] = True
app.secret_key = config.app_secret
genshi = Genshi(app)
genshi.extensions['html'] = 'html5'
def check_output(*popenargs, **kwargs):
# Copied from py2.7s subprocess module
r"""Run command with arguments and return its output as a byte string.
If the exit code was non-zero it raises a CalledProcessError. The
CalledProcessError object will have the return code in the returncode
attribute and output in the output attribute.
The arguments are the same as for the Popen constructor. Example:
>>> check_output(["ls", "-l", "/dev/null"])
'crw-rw-rw- 1 root root 1, 3 Oct 18 2007 /dev/null\n'
The stdout argument is not allowed as it is used internally.
To capture standard error in the result, use stderr=STDOUT.
>>> check_output(["/bin/sh", "-c",
... "ls -l non_existent_file ; exit 0"],
... stderr=STDOUT)
'ls: non_existent_file: No such file or directory\n'
"""
if 'stdout' in kwargs:
raise ValueError('stdout argument not allowed, it will be overridden.')
process = subprocess.Popen(stdout=subprocess.PIPE, *popenargs, **kwargs)
output, unused_err = process.communicate()
retcode = process.poll()
if retcode != 0:
cmd = kwargs.get("args")
if cmd is None:
cmd = popenargs[0]
raise CalledProcessError(retcode, cmd, output=output)
#raise Exception(output)
return output
def allowed_file(filename):
return '.' in filename and filename.rsplit('.', 1)[1] in config.allowed_extensions
@app.route('/')
def index(**kwargs):
data = defaultdict(str)
data.update(**kwargs)
filelist = glob.glob(config.datadir + '/*.schild')
data['files'] = [ unicode(os.path.basename(f)) for f in sorted(filelist) ]
return render_response('index.html', data)
@app.route('/edit')
def edit(**kwargs):
data = defaultdict(str)
data.update(**kwargs)
imagelist = glob.glob(config.imagedir + '/*.png')
data['images'] = [ os.path.basename(f) for f in imagelist ]
templatelist = glob.glob(config.textemplatedir + '/*.tex')
data['templates'] = [ unicode(os.path.basename(f)) for f in sorted(templatelist) ]
return render_response('edit.html', data)
@app.route('/edit/<filename>')
def edit_one(filename):
with open(os.path.join(config.datadir, filename), 'r') as infile:
formdata = json.load(infile)
return edit(form=formdata)
def run_pdflatex(context, outputfilename, overwrite=True):
if not context.has_key('textemplate'):
context['textemplate'] = "text-image-quer.tex"
genshitex = TemplateLoader([config.textemplatedir])
template = genshitex.load(context['textemplate'], cls=NewTextTemplate, encoding='utf8')
if not overwrite and os.path.isfile(outputfilename) and os.path.getmtime(template.filepath) < os.path.getmtime(outputfilename):
return
tmpdir = tempfile.mkdtemp(dir=config.tmpdir)
if context.has_key('img') and context['img'] and context['img'] != '__none':
try:
shutil.copy(os.path.join(config.imagedir, context['img']), os.path.join(tmpdir, context['img']))
except:
raise IOError("COULD NOT COPY")
else:
#print "MEH No image"
pass
tmptexfile = os.path.join(tmpdir, 'output.tex')
tmppdffile = os.path.join(tmpdir, 'output.pdf')
with open(tmptexfile, 'w') as texfile:
texfile.write(template.generate(form = context).render(encoding='utf8'))
cwd = os.getcwd()
os.chdir(tmpdir)
os.symlink(config.texsupportdir, os.path.join(tmpdir, 'support'))
try:
texlog = check_output(['pdflatex', '--halt-on-error', tmptexfile], stderr=STDOUT)
except CalledProcessError as e:
if overwrite:
flash(Markup("<p>PDFLaTeX Output:</p><pre>%s</pre>" % e.output), 'log')
raise SyntaxWarning("PDFLaTeX bailed out")
finally:
os.chdir(cwd)
if overwrite:
flash(Markup("<p>PDFLaTeX Output:</p><pre>%s</pre>" % texlog), 'log')
shutil.copy(tmppdffile, outputfilename)
shutil.rmtree(tmpdir)
def save_and_convert_image_upload(inputname):
file = request.files[inputname]
if file:
if not allowed_file(file.filename):
raise UserWarning("Uploaded image is not in the list of allowed file types.")
filename = os.path.join(config.uploaddir, secure_filename(file.filename))
file.save(filename)
img = PythonMagick.Image(filename)
imgname = os.path.splitext(secure_filename(file.filename))[0].replace('.', '_') + '.png'
savedfilename = os.path.join(config.imagedir, imgname)
img.write(savedfilename)
os.remove(filename)
return imgname
return None
@app.route('/create', methods=['POST'])
def create():
if request.method == 'POST':
formdata = request.form.to_dict(flat=True)
for a in ('headline', 'text'):
formdata[a] = unicode(formdata[a])
try:
imgpath = save_and_convert_image_upload('imgupload')
if imgpath is not None:
formdata['img'] = imgpath
outfilename = secure_filename(formdata['headline'][:16])+str(hash(formdata['headline']+formdata['text']+os.path.splitext(formdata['textemplate'])[0]+os.path.splitext(formdata['img'])[0]))+'.schild'
outpdfname = outfilename + '.pdf'
formdata['pdfname'] = outpdfname
run_pdflatex(formdata, os.path.join(config.pdfdir, outpdfname))
with open(os.path.join(config.datadir, outfilename), 'w') as outfile:
json.dump(formdata, outfile)
flash(Markup(u"""PDF created and data saved. You might create another one. Here's a preview. Click to print.<br/>
<a href="%s"><img src="%s"/></a>""" %
(url_for('schild', filename=outfilename), url_for('pdfthumbnail', pdfname=outpdfname, maxgeometry=200))
))
except Exception as e:
flash(u"Could not create pdf or save data: %s" % str(e), 'error')
data = {'form': formdata }
imagelist = glob.glob(config.imagedir + '/*.png')
data['images'] = [ os.path.basename(f) for f in imagelist ]
templatelist = glob.glob(config.textemplatedir + '/*.tex')
data['templates'] = [ os.path.basename(f) for f in sorted(templatelist) ]
return render_response('edit.html', data)
flash("No POST data. You've been redirected to the edit page.", 'warning')
return redirect(url_for('edit'))
@app.route('/schild/<filename>')
def schild(filename):
return render_response('schild.html', {'filename':filename, 'printer':[ unicode(f) for f in sorted(config.printers.keys()) ]})
@app.route('/printout', methods=['POST'])
def printout():
filename = os.path.join(config.pdfdir, secure_filename(request.form['filename']))
printer = config.printers[request.form['printer']]
copies = int(request.form['copies']) or 0
if copies > 0 and copies <= 6:
try:
lprout = check_output(['lpr', '-H', str(config.printserver), '-P', str(printer), '-#', str(copies)] + config.lproptions + [filename], stderr=STDOUT)
flash(u'Schild wurde zum Drucker geschickt!')
except CalledProcessError as e:
flash(Markup("<p>Could not print:</p><pre>%s</pre>" % e.output), 'error')
else:
flash(u'Ungültige Anzahl Kopien!')
return redirect(url_for('index'))
@app.route('/delete', methods=['POST'])
def delete():
filename = secure_filename(request.form['filename'])
try:
os.unlink(os.path.join(config.datadir, filename))
for f in glob.glob(os.path.join(config.pdfdir, filename + '.pdf*')):
os.unlink(f)
flash(u"Schild %s wurde gelöscht" % filename)
return redirect(url_for('index'))
except:
flash(u"Schild %s konnte nicht gelöscht werden." % filename, 'error')
return redirect(url_for('schild', filename=filename))
@app.route('/image/<imgname>')
def image(imgname):
imgpath = os.path.join(config.imagedir, secure_filename(imgname))
#print(imgpath)
if os.path.exists(imgpath):
with open(imgpath, 'r') as imgfile:
return Response(imgfile.read(), mimetype="image/png")
else:
return "Meh" #redirect(url_for('index'))
def make_thumb(filename, maxgeometry):
thumbpath = filename + '.' + str(maxgeometry)
if not os.path.exists(thumbpath) or os.path.getmtime(filename) > os.path.getmtime(thumbpath):
img = PythonMagick.Image(str(filename))
img.transform("%sx%s" % (maxgeometry,maxgeometry))
img.quality(90)
img.write(str("png:%s" % thumbpath))
return thumbpath
@app.route('/thumbnail/<imgname>/<int:maxgeometry>')
def thumbnail(imgname, maxgeometry):
imgpath = os.path.join(config.imagedir, secure_filename(imgname))
thumbpath = make_thumb(imgpath, maxgeometry)
with open(thumbpath, 'r') as imgfile:
return Response(imgfile.read(), mimetype="image/png")
@app.route('/pdfthumb/<pdfname>/<int:maxgeometry>')
def pdfthumbnail(pdfname, maxgeometry):
pdfpath = os.path.join(config.pdfdir, secure_filename(pdfname))
thumbpath = make_thumb(pdfpath, maxgeometry)
with open(thumbpath, 'r') as imgfile:
return Response(imgfile.read(), mimetype="image/png")
@app.route('/tplthumb/<tplname>/<int:maxgeometry>')
def tplthumbnail(tplname, maxgeometry):
pdfpath = os.path.join(config.cachedir, secure_filename(tplname)+'.pdf')
try:
run_pdflatex(
{ 'textemplate' : secure_filename(tplname),
'img' : 'pictograms-nps-misc-camera.png',
'headline' : u'Überschrift',
'text' : u'Dies ist der Text, der in der UI als Text bezeichnet ist.',
}, pdfpath, overwrite=False
)
except Exception as e:
return str(e)
else:
thumbpath = make_thumb(pdfpath, maxgeometry)
with open(thumbpath, 'r') as imgfile:
return Response(imgfile.read(), mimetype="image/png")
@app.route('/pdfdownload/<pdfname>')
def pdfdownload(pdfname):
pdfpath = os.path.join(config.pdfdir, secure_filename(pdfname))
with open(pdfpath, 'r') as pdffile:
return Response(pdffile.read(), mimetype="application/pdf")
if __name__ == '__main__':
app.debug = True
app.run(host=config.listen, port=config.port)